feat: 新增工作流执行模块

新增流程执行记录的实体、DTO、DAO、控制器和服务层，支持工作流的执行、回调及结果树状列表查询；同时更新服务名称为 ai-agent。

workflow/service/skill/skill_template_service.go

@@ -0,0 +1,38 @@
+package skill
+
+import (
+	skillDao "ai-agent/workflow/dao/skill"
+	skillDto "ai-agent/workflow/model/dto/skill"
+	"context"
+
+	"github.com/gogf/gf/v2/util/gconv"
+)
+
+var SkillTemplateService = &skillTemplateService{}
+
+type skillTemplateService struct{}
+
+func (s *skillTemplateService) Create(ctx context.Context, req *skillDto.CreateSkillTemplateReq) (res *skillDto.CreateSkillTemplateRes, err error) {
+	id, err := skillDao.SkillTemplateDao.Insert(ctx, req)
+	if err != nil {
+		return
+	}
+	return &skillDto.CreateSkillTemplateRes{Id: id}, nil
+}
+
+func (s *skillTemplateService) Delete(ctx context.Context, req *skillDto.DeleteSkillTemplateReq) (err error) {
+	_, err = skillDao.SkillTemplateDao.Delete(ctx, req)
+	return
+}
+
+func (s *skillTemplateService) List(ctx context.Context, req *skillDto.ListSkillTemplateReq) (res *skillDto.ListSkillTemplateRes, err error) {
+	list, total, err := skillDao.SkillTemplateDao.List(ctx, req)
+	if err != nil {
+		return nil, err
+	}
+	res = &skillDto.ListSkillTemplateRes{
+		Total: total,
+	}
+	err = gconv.Struct(list, &res.List)
+	return
+}